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This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Microwave Engineering knowledge and support exam preparation. Choose a topic below to get started.
1. |
RF input matching and RF-LO isolation can be improved through the use of: |
A. | Balanced mixer |
B. | Single-ender diode mixer |
C. | Single ended FET mixer |
D. | Image reject mixer |
Answer» B. Single-ender diode mixer | |
2. |
The curve of FET transconductance v/s gate-to-source voltage is a straight line through origin. |
A. | True |
B. | False |
Answer» C. | |
3. |
The IS-54 digital cellular telephone system uses a receive frequency band of 869-894 MHz, with a first IF frequency range of 87 MHz, one possible range of local oscillator frequency is: |
A. | 956 to 981 MHz |
B. | 750 to 784 MHz |
C. | 869 to 894 MHz |
D. | None of the mentioned |
Answer» B. 750 to 784 MHz | |
4. |
RF_INPUT_MATCHING_AND_RF-LO_ISOLATION_CAN_BE_IMPROVED_THROUGH_THE_USE_OF:?$ |
A. | Balanced mixer |
B. | Single-ender diode mixer |
C. | Single ended FET mixer |
D. | Image reject mixer |
Answer» B. Single-ender diode mixer | |
5. |
THE_CURVE_OF_FET_TRANSCONDUCTANCE_V/S_GATE-TO-SOURCE_VOLTAGE_IS_A_STRAIGHT_LINE_THROUGH_ORIGIN.?$ |
A. | True |
B. | False |
Answer» C. | |
6. |
The IS-54 digital cellular telephone system uses a receive frequency band of 869-894 MHz, with a first IF frequency range of 87 MHz, one possible range of local oscillator frequency is? |
A. | 956 to 981 MHz |
B. | 750 to 784 MHz |
C. | 869 to 894 MHz |
D. | None of the mentioned |
Answer» B. 750 to 784 MHz | |
7. |
A mixer having high conversion loss is said to have very high: |
A. | Gain |
B. | Loss |
C. | Bandwidth |
D. | None of the mentioned |
Answer» C. Bandwidth | |
8. |
A mixer can be used for both up conversion and down conversion at the transmitter and receiver respectively. |
A. | True |
B. | False |
Answer» B. False | |
9. |
A mixer consists of a non-linear device that produces various harmonics of the input frequency. |
A. | True |
B. | False |
Answer» B. False | |
10. |
An ideal _______ produces an output consisting of the sum and difference frequencies of the two input signals. |
A. | Mixer |
B. | Amplifier |
C. | Product modulator |
D. | Phase modulator |
Answer» B. Amplifier | |
11. |
If the input power for a frequency doubler is 10.7 mW and the output measured after the frequency doubling process is 21 mW, then the conversion gain for the frequency doubler is: |
A. | 4.5 dB |
B. | 8.4 dB |
C. | 9.8 dB |
D. | 2.9 dB |
Answer» E. | |
12. |
A major characteristic property required by frequency multipliers for frequency multiplication to happen is: |
A. | High gain |
B. | High conversion efficiency |
C. | Non linearity |
D. | None of the mentioned |
Answer» D. None of the mentioned | |
13. |
Transistor multipliers are more efficient compared to diode multipliers from all operational aspects. |
A. | True |
B. | False |
Answer» B. False | |